Operating device for impression throw-offs.



E. P. JENNINGS, 1n.

OPERATING DEVICE FOR IMPRESSION THROW-OFFS. APPIZICATION FILED SEPT-25. l9l6.

1 ,279,873. Patented Sept. 24, 1918.

2 SHEETS-SHEET I.

INVENTOR.

lmersa/r 7112/70/21 #7: BY 9!;

E. Pl JENNINGS, JR.

OPERATING DEVICE FOR IMPRESSION THHOW-OFFS.

' APPLICATION men SEPT-25 1MB.

1,279,873. Patented Sept. 24, 1918.

, 2 SHEETSS"ET 2.

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Specification of Letters Patent. 7

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Patented 'sept. 24,1918? Original application filed March 39, 1918, Serial No. 87,725.: Divided and tliisapplication filed September [0 all whom it may concern:

Be it known that LEMnRsoN P; JENNI GS, J12, a citizen of the United States, residing at Lehighton, in the county of Carbon and State of Pennsylvania, have invented certainnew and useful Improvementsin Operating Devices for Impression Throw-Oils, of :which, the following is a specification, reference being had therein to the accom-- panyingdrawings; V a

This invention relates to a device for oper-v ating the impressionthrow-off of a printing press, and the present application is a division of the application filed by me lvlarch th,-19l6, Serial Number 87725; In the operation of a printing press it is undesirable that the form should engage the-make-ready on the platemand to prevent thisengagement when no paper has been placed in; printing position, without stopping the press, it is customary to pro-. ride an impression throw-off by means of whichoneinember of the printing couple canbei moved fiom its normal position a distance suflicient toprevent the engagement of.

the two members thereof when they are brought into what would otherwise be their printing positions. The throw-oil is usually manipulated by the operator but in the case of presses in which the paper isfed automatically, either in a web or in sheets, the v operator does not watch the feeding of the paper'closely enough to enable him to operate the throw-off in time to prevent the form from en a in the make-read and it is desirable that the throw-oil should in' such cases-be automatically controlled;

The object of the invention is to provide means operated bya moving part otthe press to automatically actuate the throw-off when no paper is fed to printing position; and further to provide such a device with means to automatically restore to its normal 7 position that member of the printing couple provide such a device which will be sufficiently sensitive to enable it to be controlled bythe paper which is being fed to the printing couple, andwill be of'a strong durable character and of such a construction as to render it highly practical for commercial use."

V In the" accompanyingdrawings Figure 1 is aside elevation of a printing press show- Serial No. 121 945.

ingmy invention applied thereto Fig; 2 is a side elevation of anenlarged scale olfa portion ofthe press showing theiinvention applied thereto, and-Fig. 3 is a sectional; do tail view of the actuating ban 7 In these drawingsI have illustrated one embodiment of my invention; and: have shown it as applied to a bed and platen press equlpped with. an automatic sheet-feed but it will be understood that thiszparticular type of press and of feeding mechanism. is show-n for the purpose of illustration only.

The press here shown comprises the main frame 1 consisting of. side members spaced apart and tied together by tie rods and:- con: necting devices-and serving tosupport-the various mechanisms; A normallystationaryplaten 2 is mounted near one end of the press and a combined for-m bed and inking drum 3is parts of the printingandfeeding r mounted for movement toward. and fromthe platen. The combined form bed and inking drum is provided at its ends with trunnions 4 mounted in guide blocks 5 which are slidably mountedv in guideways 6 formed: in -the side walls of the main frame 1.- These trun 7 nions are connected by pitmen7 withfcrank wheels 8 which are here shown as gears meslt ing with 'pinions 9 mounted ona shaft 10-to applied in any suitable reciprocatorvba'rs' l3--which are ac tuated T from a moving part of the press @mdwhich'v carry conveying grippers 14: themovement: oi which is so timed thatthey will engage the separated edge of a sheet of thepile of;

sheets and draw the same from said pileand" into printing position The present separat mg" device separates 1 the lowermost sheet from thepile and this sheet is drawn-from beneath the pile by the conveying grippers This mechanism is fully illustrated and denscribedin the above mentioned application and further description of; the" same wane seem to. be unnecessary to an j'understa nding of the present invention. I

The press is provided with throw-oil? mechanism radapted to move the platen toward and away; from the 'form bed; thus enabling it to bermoved'out of the: path" of set screw 108 which extends into a slot 10 the form. and to prevent an impression from being taken. This throw-otf mechanism may be of any suitable character but that here shown is of the type shown and de scribed in the patent to Cartwright, No. 1,069,764, of August 12th, 1913. The mechanism of the throw-off forms no part of the present invention and it is sufiicient to note that it is provided with an operating handle 101 by means of which it is manipulated to impart movement to the platen. In order to automatically operate this throw-off I establish a connection between the handle 101 and a moving part of the press, such as one of the slide blocks 5, which carry the formbed. This connection is of such a character that when a sheet is fed to printing position the connection is inoperative and the throwoff mechanism is not actuated. However, when no sheet is fed to printing position the connection becomes operative and the mechanism is actuated. Preferably, the connection comprises two members slidably connected, with a stop adapted to be moved into and out of a position to interrupt the movement of one of the members and this stop is controlled by the paper which is being fed to the printing position. As here shown the connect-ion comprises a telescoping rod, one part, 102, of which is connected with the handle 101 and the other part, 103, of which is connected with a bracket 104 secured to the slide block 5 and has its inner end slidably mounted in the rod 102, which is tubular. The relation of the two parts of the rod is such that when unobstructed the part 103 is free to slide in the part 102,

throughout the movement of the slide block 5 and the form-bed. The tubular member 102, however is provided with a movabl stop, and, as here shown, has in one sid thereof an aperture 105 in which is slidably mounted a pin or stop 106. A boss 107 pro jects from the outer surface of the tubula member in alinement with the aperture anc cooperates therewith to form a guideway fo the pin 106. The boss is provided with L in the side of the pin 106 and serves t limit its movement. This pin is arranged t be actuated by a finger 110 rigidly secure to a shaft 111 which is rotatably mounted f on the press, in the present instance, on thel.

supplemental frame 13*. An arm 112 is rig idly secured to the shaft 111 and extends? forwardly to a point between the platenl and the sheet separating device, with its forward end arranged in such a position that it will be engaged by the sheet as it is withdrawn from the pile and moved. down ward, thus rocking the shaft 111 and cans ing the arm 110 to lift the pin 106 out of the path of the inner member 103 of the telescoping rod, thereby permitting this member to have continued movement in the member 102, and preventing the operation of the throw-01f mechanism. However, if a sheet is not fed across the end of the arm 112 the stop will remain in the path of the inner member 103 of the connecting rod and will thus form a rigid connection between the two parts of the device which will cause the operation of the throw-ofi mechanism. The inner member 103 of the actuating rod is provided within the outer member 102 of that rod with a lug or shoulder 115 which is arranged to cooperate with a lug 116 carried by the outer member. The two lugs are so arranged that when no movement has been imparted to the actuating bar as a whole, to operate the throw-off, the lug 116 will lie beyond the limit of movement of the lug 115. However, when the actuating bar has been operated to actuate the throwoff, the lug 116 will move toward the throwoff mechanism and upon the outward movement of the inner member 103, the lug 115 will engage the lug 116 and return the outer member 102 of the actuating bar to its normal position thus throwing on the impression. If desirerh'the inner member 103 may be provided with an extension 117 slidably mounted thereon and arranged to contact with the pin 106 and a cushioning spring 118 may be interposed between this extension and the body of the inner member, thus cushioning the contact between the two parts of the actuating device. Preferably, the pin 106 is provided at its upper end with an antifriction roller 113 to engage the arm and a spring 114. serves normally to move the pin downward. But the whole mechanism is carefully balanced so that it tcan be operated by the sheet as it is drawn from the pile. It will be obvious, however, 105

hat this mechanism is not limited in its utility to a sheet feed but that substantially the same operation will be had if used in onnection with feeding mechanism for a ,ontinuous web of material. 7 Having shown and described one embodiment of my invention, I wish it to be unlerstood that I do not wish to be limited to he details of construction for'various modifications will. occur to a personskilled in he art.

, Having thus fully described my invention, what I claim as new and desire to secure by AQt-tBl'S Patent isz-- V I 1. In a printing press, a printing couple 120 "comprising a normally stationary member land a member movable toward and from said stationary member, means for feeding paper to said printing couple, throw-off mechanism to move said stationary member rearwardly from its normal position to throw off the impression, a normally operative actuating device for said mechanism, and a part operatively connected with said 1; actuating device and arranged to be engaged and actuated by'th'e paper 'asitisfed 'to said printing couple to render said actuating-device inoperativeand to prevent the operation of said throw-off mechanism;

2. In a printing press,a printing couple, means for feeding paper thereto, 'mechanism to shift one member of said printing couple to throw 05 the impression, an aotu atingv device for said-throw-oil mechanism comprising two parts connected respectively with said throw-off mechanism and with a movable part of said press, the two parts of said device being connected one with the other for relative longitudinal movement, means normally limiting the relative movements of the two parts of said deviceto cause said throw-offmechanism to be Operated, and a part operatively connected with said means and arranged to be' actuated by the paper as it is fed to said printing couple to move said means into aninopcrativeposition.

3. In a printing press, a printing couple, means for feeding paper thereto, mechanism to shift one inemberof said printing couple to throw off the impressiomzan actuating device for said throw-off mechanism com;- prising two overlapping parts connected respectively with said throw-offmechanism and-"witha movable part ofsaid press, the two parts of saidactuating device having 7 movement relatively" one to theother, a

movable-stop held normally in. a position to limit-the relative movement of said parts and thus establish an operative connection between said throw-off mechanism and said movable part of said press, anda device operatively connected 'with saidstop and arranged to be actuated by the paper as it movement relatively one to the other, a movable stop held normally in a position to limit the relative movement of said parts and thus establish an operative connection between said throw-off mechanism and said movable part of said press, and a device operatively connected with said stop and arranged to be actuated by the paper as it is fed to said printing couple to move said stop into an inoperative position.

5. In a printing press, a printing couple, means for feeding paper thereto, throw-01f mechanism for one member of said printing couple, an actuating device for saidthrowoil mechanism comprising two overlapping dinal movement relatively one to the" other,

a movable stop" held-normally in apcsit-ion to limit themovement of said partsof said 'actuating'device in one directioute cause said throw-ofl? mechanism 5 to be operated, said parts-of said actuatingxdevice having portions cooperating to limit their relative movement in an opposite direction and thus cause'thethrowpff mechanism to be moved in a-direction= to restore the impression, and a device operatively connected with said stop and arranged to be actuated by; the paper as is fed'to'said printing couple to move said stop into an inoperative position and thus prevent' the operation ofsaid throw-off" mechanismi 6. In a printing press, a printing couple, means for feeding paperto said couple, throW-Off mechanism' for one member of said "printing couple, an actuatingi'ocl for said throw-off 'mechanisin comprising two telescoping parts connected at theiroppositeends with said throw-elf mechanism and with a movable part-of said 'press, respectively, a stopmovably mounted on one part a of said rod and held normally in the path of the other part thereof, a finger pivotally mounted on said 'press,=operatively connected with said stop and having a part arranged in the'path' of the paper as it is fed to "said printing couple, whereby saidxfinger willbe actuated-by thfe'paper to move tliestop into inoperativeposition; Y

I 7. In a printing press,- a" printing couple, one member of which is movable toward and from he. other, means for feedingpaper tosaid printing couple, a swer mechanism for one member of 1 said printing cOuple, an actuatingrrod for said throw-off mechanism comprising telescoping. parts, one" of. which parts is connected with the'movable member of 'said printing coupleand therotherbf which parts is "connected with said" throwoftmechanis'm, a stop movably mo'unted on one part of said tl irow-off mechanism and held normally in the pathof the other part thereof to limit the movement of the one part toward the other, and means actuated v by the paper as it is fed to said printing couple to move said stop into an inoperative position whereby the movement of the one part of said telescoping rod relative to the other part thereof is limited only by the movement of the movable member of the printing couple.

8. In a prlnting press, a printing couple, means for feeding paper to said printing couple, throw-off mechanism for one member of said printing couple, an actuating rod for said throw-ofi" mechanism comprising telescoping parts, one of which is connected with said throw-ofl' mechanism and the other of which is connected with a movable part of said press, a movable stop held normally in position to limit the movement of the last mentioned part of said rod toward the other part and thus cause said rod to move as a whole and to actuate said throw-ofi mechanism, the two parts of said rod having cooperating lugs adapted to be brought into engagement by the movement of the last mentioned part of said rod away from said first mentioned part thereof, to restore said throw-ofl mechanism to its normal position, and means actuated by the paper as it is fed to said printing couple to move said stop into an inoperative position and thus pre vent the operation of said throw-ofl" mechanism.

9. In a printing press, a printing couple, one member of which is movable toward and from the other, means for supporting a pile of sheets above said printingcouple, feeding mechanism to carry a sheet of paper from said pile into a printing position between the members of said printing couple, throw-oii' mechanism for one member of said printing couple, an actuating rod comprising overlapping parts connected respectively with said throw-oil? mechanism and with a movable part of said press,,a stop to limit the relative movement of the parts of said actuating device in one direction to cause said throw-off mechanism to be operated, an arm pivotally mounted above said actuating device and connected with said stop, a finger connected with said arm and having one end extending into position between said sheet supporting means and said printing couple, whereby said finger will be engaged by the sheet as it is fed from said pile to said printing couple and will be actuated to cause said stop to be moved into an inoperative position.

10. In a printing press, a printing couple comprising a normally fixed member and a member movable in a right line toward and from said fixed member, means for feeding paper to said printing couple, throw-off and actuate said throw-off mechanism, and

means actuated by the paper as it is fed to said printing couple to move said stop into an inoperative position, and thereby permit the one part of said rod to slide within the other part thereof without operating said throw-off mechanism.

11. In a printing press, a printing couple comprising a normally fixed member and a member movable in a right line toward and from said fixed member, means for feeding paper to said printing couple, throw-off mechanism for one member of said printing couple, an actuating rod for said throw-off mechanism comprislng two telescoping parts connected respectively with a movable member of said printing couple and with said throw-off mechanism, a stop movably mounted on one part of said rod and held normally in the path of the other part thereof to cause the two parts to move together and actuate said throw-off mechanism, means actuated by the paper as it is fed to said printing couple to move said stop into an inoperative position, and thereby permit the one part of said rod to slide within the other part thereof without operating said throw-off mechanism, and other stops carried by the two parts of said rods and arranged to be brought into operative engagement when the one part of said rod is moved EMERSON P. JENNINGS, JR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

